| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could not [vb infin] [conj] | 454 |
|
| 2 | could not [vb infin] [be] | 369 |
|
| 3 | not [vb infin] [be] [conj] | 52 |
|
| 4 | could [vb infin] [be] [conj] | 42 |
|
